Your pupillary distance is vital to making eyewear correctly. If you are wondering why your PD is not on the prescription the Doctor gave you, it is due to the fact they rely on the optician who is filling the prescription to determine the proper measurements to achieve the best results. A true professional will not rely on the measurements of others when creating something as custom as a pair of eyewear. When you ask for something you see as simple as the pupillary distance, your optician views that as someone wanting their profession services for free. We as opticians naturally want to help people have good vision and is the reason many of us provide this as a curtesy for our patients, but know that online services are using and taking advantage of free services provided by your optician to lower their own cost of operations. Warby Parker has realized that having proper measurements and adjustments are so important to patient satisfaction, they have started reimbursing up to $50 for your optician to provide this service for you. Remember when you decide to get glasses online, it is like a do it yourself project. DIY projects are great for saving money, but you rarely get the same results as if a professional had done it. Remember you are asking for professional help when you ask for a PD and frame adjustments so don’t be angry if they charge a fee for their services.